Henry



(No Model.)

H. C. JOHNSON 8v F. M. MOMILLAN.

COOLING AND VBNEILATINe GARS 462l Patented July 18, 1882.

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UNITED STATES PATENT OFFICE.

HENRY O..JOHNSON AND FRANCIS M. MGMILLAN,OF WASHINGTON, D. O.

COOLING AND VENTILATING GARS.

SPECIFICATION forming part of Letters Patent VNo. 261,462, dated July18, 1882.

Application filed Api-i1 er, lesa (No model.)

To all whom it may concern:

Be it known that we, HENRY C. JOHNSON and FRANCIS M. MGMILLAN, ofWashington, in the District of Columbia, have invented certainImprovements in Cooling and Ventilating Cars, ot' which the following isa specification.

This invention relates to a modication or adaptation of the system ofrefrigeration or cooling described and claimed in the patent granted tous bearing date May 9, 1882, and numbered 257,506; and theimprovementsconsist in combining with our former apparatus in a railway-car a fan orair-forcing apparatusV driven from the truck-wheels and arranged to drawthe air through a filtering or purifying material, to pass it through achamber cooled by the expansion of gas, as in said patent, and todeliver it thus purified into the interior of the car. It furtherconsists in utilizing theview illustrating the employmentof the ordi-vnary heater pipes or coils.

As will be seen by reference to our patent above referred to, our systemof cooling consists essentiallyin chargin ga portable receiver withliqueed gas, and permitting said gas to escape in a tine stream andexpand in a coil or chamber, then to pass oft', and in the presentinstance we prefer to follow closely the same plan, though not limitingourselves absolutely thereto.

The air supplied to the cooler-.is preferably drawn through afiltering-chamber, and then passed upward through Water to purifyit andto precipitate or remove dust, cinders, and other. foreign matters butthe filtering-chamber mayin some cases be omitted, and-the air simplypassed upward through the water.

The present arrangement is designed primarily for cooling passenger-cars, but may also be used With advantage in cars for thetransportation of perishable matters.

Referring again to the drawings, A represents a car, Within which isplaced a receiver, B, charged with liquefied gas, (carbonic-acid gasbeing preferred,) said receiver communieating with an expansion coil orchamber, C, and being provided with a cock or valve, D, by which thedischarge of gas into the coil `may be carefully regulated. p

The coil or expansion chamber is placed Within a casing or chamber, E,which may or may not contain brine or other non-congea-lable liquid, andis arranged to discharge the spent gas at the outside of thecar'ordinarily.

F represents afan or other air-forcing apparatus communicating' with andarranged to deliver air intothe chamber E, its supply being taken fromoutside the car through a suitable inlet-pipe, G, which is preferablyextended' above the car and formed with a filtering-chamber, H, invihich is placed charcoal, sponge, gravel, or other suitable filteringmaterial.

The discharge end of the spout of fau F is bent downward and dips into awell or pit, E',

at the bottom or end ot' chamber E, containing water, the mouth or openend ot' the fau-spout being carried nearly to the bottom ot' the well orwater-chamber, as shown in Fig. 2, so that the air discharged throughsaid spout is caused to ascend through the water, by which plan allimpurities are removed and the air is in a measure cooled. If brine orother non-cougealable liquid be employed in the chamber E, as willfrequently be the case, the cooling will be wholly effected by thepassage of the air through the refrigerated liquid in this Inanner, andin such' case we will preferably employ1 mechanism similar to that shownand described in our aforesaid patent to effect a circulation of theliquid through the chamber E and outer coil or chamber to remove theheat absorbed.

For the purpose of operating the fan and the circulating mechanism, ifany be used, we provide a friction-wheel, I, which is arranged to bearupon the tread of one of the truckwheels, or upon a special wheelsecured to one of the truck axles, said wheel being held against thedriving-wheel by a spring, J.

On the same shaft with wheel I is placed a belt Wheel or pulley, K, fromwhich a belt, L, is carried about the fan-pulley M, as shown, thusimparting motion to the fan. The belt L will preferably he made ofelastic material, to prevent any undue strain upon the machinery whenthe ear is turninga curve or through the vertical movement of thecar-body.

In palace-ears, where double Windows are commonly employed and the Wallsare thick, the invention can be applied to special advantage, the doors,windows, and other openings heilig closed and the necessary supply andexchange of air being' a'orded through the action ot' the coolingapparatus. In this way the heat and dust of summer travel by rail may beentirely obviated.

In cars provided with the Baker heater or similar heater employingcirculating pipes or coils the heater proper may be detached andremoved, and the brine or liquid or the liqueed gas circulated throughthe ordinary heating-pipes, thus permitting the apparatus to be appliedto cars with great facility and to the best advantage. When this isdone. the air circulating or forcing apparatus may be omitted in somecases but we preier to retain itin all cases to give the proper supplyand change of air.

The brine or liquid may in some cases be pumped or raised to the top ofthe car and allowed to descend in the form of a spray through thecooling-chamber.

We are aware that heat-distributing pipes have been used for coolingpurposes, and this we do not claim.

Having thus described our invention, what we claim is- 1. Theherein-described cooling apparatus for cars, consisting of gas-receiverB, eXpansion coil or chamber U, tank E, fan F, and friction-gear,substantially such as shown and described, forimparting motion from thetruckwheels to the fan.

2. In combination with a refrigerating apparatus substantially such asdescribed, acasing surrounding the expansion coil or chamber or a partthereof, and provided with a liquidchamber, and a fan arranged todeliver air into the liquid-chamber, substantially as explained, wherebythe airis caused to pass upward througbthe liquid.

3. In combination with a refrigerating apparatus substantially such asshown and described, a i'an arranged to supply airthereto, and asupply-pipe i'orthe t'an, provided with a filtering-chamber, as and forthe purpose set forth.

HENRY C. JOHNSON. FRANCIS M. MCMILLAN.

Nitnessesz ALBERT MILLER, JAMES A. BABsoN.

